A3932SLDTR-T

• Product Introduction

The A3932 is a three-phase MOSFET controller for use with a bipolar brushless DC motor. Its high-gate current drive capability drives a wide range of N-channel power MOSFETs and supports 50-volt motor supply voltages. The bootstrap high-end drive block provides floating positive power to the gate drive and minimizes the number of components required for normal operation. The high-end circuitry also features a unique FET monitoring circuit to ensure that the gate voltage is at the correct level before opening and during the ON cycle.

An internal fixed downtime PWM current control circuit adjusts the maximum load current to the desired value. The user can set the peak load current limit by selecting the input reference voltage and external inductive resistor. Users can set a fixed downtime pulse duration by selecting an external RC timing network. For additional flexibility, PWM inputs can be used to provide speed/torque control, allowing the internal current control circuitry to set the maximum current limit.

Optional synchronous rectification is included. This feature shortens the current path through a power MOSFET reverse diode during PWM non-cyclic current decay. This reduces power dissipation in power MOSFETs, eliminates the need for external power clamping diodes, and provides a more economical option for MOSFET applications.

The A3932 provides rectification logic for Hall sensor ICs configured with 120 degree pitch. Power MOSFET protection features include bootstrap capacitor charge current monitoring, undervoltage monitoring, motor pin ground short circuit, and overtemperature shutdown.

• 驱动范围广泛的 N 通道 MOSFET
• 同步整流
• 功率 MOSFET 保护
• 可调整停机时间实现交叉导通保护
• 100% 占空比操作
• 可选快或慢电流衰减模式
• 内部 PWM 峰值电流控制
• 高电流门极驱动
• 电动机引脚接地短路保护
• 内部 5 伏特稳流器
• 制动输入
• PWM 转矩控制输入
• 故障诊断输出
• 转速输出
• 过热关机
• 欠压保护